This work evaluates the integral effect of thermal comfort (TC), indoor air quality (IAQ) and Draught Risk (DR) for desks with four personalized ventilation (PV) systems. The numerical study, winter summer conditions, considers a virtual chamber, desk, different PV systems, seats manikins. Two configurations, two upper lower terminal devices (ATD) distance between them are considered. In this s...

By measuring the halothane concentrations in samples of air from three different operating theatres during routine operating lists the pattern of spread of the waste anaesthetic gases has been demonstrated. The results show that in all the theatres there was a spread of halothane from its point of escape from the anaesthetic circuit to all parts of the theatre air. A turbulent flow ventilation ...

This paper presents CFD simulations of natural displacement ventilation airflows in which the buoyancy force produced by a heat source is opposed by a wind force. Cases investigated focus on windbuoyancy force relationships for which a two-layer stratification is maintained. CFD predictions of the position of the interface separating the two layers and the change in reduced gravity (temperature...

Accurate and reliable CFD simulation of temperature stratification in indoor environment is needed for the design and evaluation of displacement ventilation in buildings. This paper presents a detailed and systematic evaluation of the capability of 3D steady RANS CFD simulations to predict the temperature stratification in a room. The evaluation is based on sensitivity analysis and validation w...

This paper illustrates a step-by-step process on how to use "The Manual for Verification, Validation, and Reporting of Indoor Environment CFD analyses" developed by ASHRAE. The details of the manual are further explained through an example of indoor environment modeling (an office with mechanical displacement ventilation). The verification, validation, and reporting do not have to be documented...

Congenital lobar emphysema is an uncommon bronchopulmonary malformation characterized by lobar overinflation and accompanying alveolar septum damage that leads to compression atelectasis of the lung parenchyma and displacement of mediastinal structures, with the resultant ventilation-perfusion mismatch. We present a case of a 33-year-old lady with progressive exertional dyspnea. Chest radiograp...

Treatment of Myelodysplastic Syndromes Selection of the treatment plan for a patient with myelodysplastic syndromes (MDS) depends upon the prognosis for the disease course. Currently, the best approach for assessing prognosis is to utilize the International Prognostic Scoring System (IPSS). The IPSS incorporates the results from three types of analyses—the levels of blood counts, the percent of...